<template>
  <div class="list" ref='wrapper'>
		<div>
			<div class="area">
				<div class="title border-topbottom">当前城市</div>
					<div class="button-list">
						<div class="button-wrapper">
							<div class="button">{{this.city}}</div>
						</div>	
					</div>
			</div>
			<div class="area">
				<div class="title border-topbottom">热门城市</div>
					<div class="button-list">
						<div class="button-wrapper" 
						v-for="item of hot" 
						:key="item.id"
						@click="handlCityClick(item.name)"
						>
							<div class="button">{{item.name}}</div>
						</div>	
					</div>
			</div>
			<div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
				<div class="title border-topbottom">{{key}}</div>
				<div class="item-list">
					<div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id"
					@click="handlCityClick(innerItem.name)"
					>{{innerItem.name}}</div>
				</div>
			</div>
		</div>
	</div>
</template>
<script>
import {mapState,mapMutations} from 'vuex'
import Bscroll from 'better-scroll'
export default {
		name:'CityList',
		props:{
			hot:Array,
			cities:Object,
			letter:String
		},
		methods:{
			handlCityClick(city){
				this.changeCity(city)
				this.$router.push("/")
			},
			...mapMutations(['changeCity'])
		},
		computed:{
			...mapState(['city'])
		},
		mounted(){
			this.scroll=new Bscroll(this.$refs.wrapper) 
		},
		watch:{
			letter(){
				if(this.letter){
					const element=this.$refs[this.letter][0]
					this.scroll.scrollToElement(element)
				}
			}
		}
}
</script>
<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
	.border-topbottom
		&:before
			border-color:#ccc
		&:after 
			border-color:#ccc
	.list
		overflow hidden
		position absolute
		top 1.58rem
		left 0
		right 0
		bottom 0
		.title
			line-height .54rem
			background #eee
			padding-left .2rem
			color #666
			font-size .3rem
		.button-list
			overflow hidden
			padding: .1rem .6rem .1rem .1rem
			.button-wrapper
				width 33.33%
				float left
				.button 
					padding .1rem 0
					margin .1rem
					text-align center
					border:.02rem solid #ccc 
					border-radius:.06rem
		.item-list
			.item
				line-height .76rem
				color #666
				padding-left .2rem
				font-size .3rem
			.border-bottom
				&:before
					border-color #ccc
</style>